EPJ

2021 Impact factor 3.131
EPJ A - Hadrons and Nuclei
Hadrons and Nuclei
Eur. Phys. J. A 7, 543-557

Production of $\phi$ mesons in near-threshold $\pi\,N$
and $N\,N$ reactions

A.I. Titov1,2 - B. Kämpfer1 - B.L. Reznik3

1 Forschungszentrum Rossendorf, PF 510119, 01314 Dresden, Germany
2 Bogoliubov Laboratory of Theoretical Physics, JINR, Dubna 141980, Russia
3 Far-Eastern State University, Sukhanova 9, Vladivostok 690090, Russia

Received: 27 January 2000 Communicated by W. Weise

Abstract
We analyze the production of $\phi$ mesons in $\pi N$ and NN reactions in the near-threshold region, using throughout the conventional ``non-strange'' dynamics based on such processes which are allowed by the non-ideal $\omega-\phi$ mixing. We show that the occurrence of the direct $\phi NN$ interaction may show up in different unpolarized and polarization observables in $\pi N\to N\phi$ reactions. We find a strong non-trivial difference between observables in the reactions $pp\to pp\phi$ and $pn\to pn\phi$ caused by the different role of the spin singlet and triplet states in the entrance channel. A series of predictions for the experimental study of this effect is presented.

PACS
13.75.-n Hadron-induced low- and intermediate-energy reactions and scattering (energy $\le$10 GeV) - 14.20.-c Baryons (including antiparticles) - 21.45.+v Few-body systems

Copyright Società Italiana di Fisica, Springer-Verlag 2000

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